Description Japanese Knotweed Identification is a specialized company focused on the accurate identifi cation and assessment of Japanese Knotweed, an aggressive and invasive plant species Address 1b Concourse Way, Japanese Knotweed Assessment Department, Sheffield, South Yorkshire S1 2BJ Phone 01144190326 Website https://japaneseknotweedidentification.co.uk/ Opening Hours ... https://japaneseknotweedidentification.co.uk/